Shoe jack



Get. 25, 1949. c. F. HAMMANN SHOE JACK Original: Filed Qct. 20, 1943Oct. 25, 194 c. F. HAMMANN SHOE JACK 5 Sheets-Sheet 1 Original FiledOct. 20, 1943 lllllllllllll I... llll II III] |l1l|l|ll |L C. F. HAMMANNSHOE JACK Get; 25, 1949.

5 Sheets-Sheet 3 Original Filed Oct. 20, 1943 IN VEN TOR. 7 WWW Oct. 25,'1949. c. F. HAMMANN SHOE JACK Original Filed Oct. 20. 1943 5Sheets-Sheet 4 2' v INVENTIOR. BY v i fl Oct. 25, 1949. c. F. HAMMANN2,485,596

sX-IQI: JACK Original Filed 001;. 20, 1943 5 Sheets-Sheet 5 INVENTOR.

Patented Oct. 25, 1949 UNITED STATES PATENT OFFICE SHOE JACK Carl F.Hammann, Boston, Mass., assignor to North American Research Corporation,Cambridge, Mass., a corporation of Massachusetts Claims.

This invention relates to apparatus for applying plastic material toarticles, and more particularly to machines for applying filler materialto the bottoms of shoes.

The device herein described is a shoe holding mechanism especiallysuitable for use in an automatic shoe filler machine of the typedescribed in copending application Serial No. 506,931, filed October 20,1943, which issued on November 2, 1948, as Patent No. 2,452,565, ofwhich this application is a division. For subject matter shown anddescribed but not claimed in this and parent application, reference ismade to other copending divisional applications Serial No. 762,135 filedJuly 19, 1947, and Serial No. 762,136, filed July 19, 1947.

The object of this invention is to provide a shoe holding device whichholds a shoe securely but permits easy insertion and removal of theshoe, which serves to gauge the shoe size for further operations by themachine, which adjusts itself readily to shoes of different sizes andwhich, with all these advantages, is relatively simple in construction.

These and other objects, aspects and features will be more fullyapparent from the following description of several practical embodimentsi1- lustrating the genus of the invention. The description refers todrawings in'which:

Fig. 1 is a top plan view, partly in section, of a filler machineemploying this invention;

Fig. 2 is a section on line 2-2 of Fig. 1 omitting the lower portion ofthe base of the machine and the driving motor housed therein;

Fig. 3 is a section on line 3--3 of Fig. 2 with parts of theshoe-supporting jack mechanism removed;

Fig. 4 is a section on line 44 of Fig. 1 with the filler-spreading anddistributing mechanism shown in elevation;

Fig. 5 shows a front and side elevation of the horizontal latch which ispart of the jack mecha nism shown in Fig. 4;

Fig. 6 is an elevation of the vertical latch also shown in Fig. 4;

Fig. 7 is a top view of the cam mechanism for controlling the jackmechanism, also shown in Fig. 4

Fig. 8 is a partial section on line 88 of Fig. 4, through the jackmechanism;

Fig. 9 is a detail view of the linkage between shoe jack and fillermechanisms as shown in Fig. 2, with the frame omitted;

Fig. 10 is a section on line Illlll of Fig. 9;

Fig. 11 is a section on line ll--|I of Fig. 9; and

Fig. 12 is a section on line [2-42 of Fig. 9.

Referring first to Fig. 1, the automatic shoe filling machine, withwhich this invention is illustrated, employs a turret head l4, driven bya Geneva motion, to move the shoes to the various operating stations.The driving arrangement for the machine and the mechanisms fordepositing a measured quantity of filler on the bottom of the shoe andfor spreading and ironing the material, are more fully described in thecopending applications referred to above. The machine employs five shoesupporting means, or jacks, as here shown, mounted at five equallyspaced stations a, b, c, d and e (Fig. 1) upon the top side of turrethead I4. One of said jack mechanisms may occupy position a. at a loadingor receiving station A during a period of rest of the turret head, asshown.

While this jack dwells at station A, a last with a partly made shoe Supon it is placed in position thereon, bottom up, as shown in Fig. 4,the jack mechanism being at that time in unlocked condition so that itcan be adjusted to fit the size of the lasted shoe.

The first step of the turret head then moves the loaded jack into idleposition b (Fig. 1) and during this movement the loaded jack is lockedin its adjusted condition.

The second step of the turret head brings the loaded jack into positionat c (Fig. 1). While the jack and shoe dwell in this position apredetermined metered amount of filler material, of a quantityproportionate to the size of the shoe whatever that may be, isautomatically deposited upon the forepart of the latter by mechanismindicated generally at C in Figs. 1 and 2.

The third step of the turret head moves the loaded jack into position atd (Fig. 1) and While it dwells in this position the deposited fillermaterial is spread, ironed and distributed over the forepart of the shoeby the mechanism that is indicated generally at D in Figs. 1 and 4.

The fourth step of the turret head shifts the jack bearing the filledshoe into position e at a delivery station E and unlocks the jack sothat the lastedand filled shoes may be removed from the machine whilethe jack dwells at station E1.

The fifth step of the turret head completes one revolution of the sameand restores the now empty and unlocked jack to position a at theloading station A.

Each jack mechanism comprises a heel rest 73 (Figs. 1 and 4) mounted toslide radially in ways 14 provided upon the top side of turret head I4and yieldingly urged toward the aXis of the latter by a pair of springs15. Upon its under side, and near its outer end, each heel-rest slidehas a depending tubular boss 16 within which is fixed a pintle 11provided at its lower end with an abutment roll 18 (Figs. 3, 4 and 9).The pintle H is fixed within boss 76 by a transverse pin 16a with whichthe outer ends of the springs 15 are connected, the outer end portionsof said springs loosely occupying grooves provided upon the bottom sideof the heel-rest as shown in Fig. 8. The inner ends of the springsarefastened to the top of the turret head as shown in Fig. 1.

The boss 76 occupies a radial slot 19 (Fig. 3) formed in turret head I4and the engagement of the boss with the inner end of this slot limitsthe inward movement of the heel-rest under the influence of springs 15.

Upon its top side each heel-rest has a V-shaped heel-receiving crotch 88(Figs. 1, 4 and8) which is inclined downwardly toward, and faces, theaXis of the turret head and into which the heel end of a lasted shoe iswedged so that the shoe is disposed bottom side uppermostand extendsupwardly and inwardly therefrom toward the axis of the turret head, withthe inner toe end of the lasted shoe abutting the hub of the turret headand supported against the under side of gauge by a toe-rest herein shownas including a roll 8!. This roll is supported for rotation on ahorizontal axis which is perpendicular to the medial line of the lastedshoe, the roll being mounted within the bifurcated upper end of a slide82 mounted within vertical ways provided in hub [4a of the turret head.The lower portion of slide 82 has avertical bore within which isarranged a coiled spring 83 by which the slide is yieldingly urgedupwardly toward, and sometimes against, a stop shoulder 84 (Fig. 2), thelower end of said spring abutting the top of the turret head.

Adjacent to the upper end thereof the hub of the turret head has aplurality of radial lugs MB (Figs. 1 and 4) which provide between themV-shaped sockets one of which is disposed immediately above each rollill to receive within it, and hold against sidewise displacement, thetoe end of the lasted shoe which is in engagement with said roll.

When an empty jack mechanism arrives at the loading station A, itsroll-carrying slide 82 is supported in position against its stop 84 byspring 83 as shown in Fig. 2, while the heel-rest 13 is held by springsl5 at the limit of its inward movement with boss 16 against the innerend of its slot 79 and roll 78 at the lower end thereof occupying aninoperative position as shown in Figs. 2 and 3.

While the empty jack mechanism dwells at the loading station A (Fig. 1)the operator places the heel end of a lasted shoe within and against thecrotch 89 of the heel-rest slide and forces the latter radiallyoutwardly until it is possible to shove the toe end of the lasted shoeinto position against the hub of the turret head between the gauge plate5| and the toe-supporting roll 8| as shown in Fig. 4, the operatoradjusting the heel end vertically relatively to the heelrest, ifnecessary, to set the bottom of the fore-v part in an approximatelyhorizontal position. When properly placed in position the toe end of thelasted shoe will occupy a position between two of the lugs Mb by whichit is held against sidewise displacement. When the lasted shoe is inposition the roll 18, which was displaced radially outwardly when thelasted shoe was applied to the jack mechanism, occupies an operativeposition with respect to a cam lever I82 (Fig. 3). This lever isactuated by roll 18 when the respective jack mechanism arrives at theposition 0.

The displacement of cam lever I82 by roll 18- eifects adjustment of thefiller metering valve, and operates the filler depositing mechanism, asmore fully described in co-pending application, SerialNo. 762,135, filedJuly 19, 1947, so as to deposit on the shoe sole an amount of fillerproportionate to the size of the shoe, while the loaded jack mechanismdwells at c.

As the loaded jack mechanism is moved from the position at a (Fig. 1) tothe position at b the two slides 13 and 82 (Fig. 4) are automaticallylocked in their adjusted positions as presently to be described andremain so locked until the loaded jack moves from the position at d(Fig. 1) to the position at e, whereupon they are automatically unlockedto permit removal of the filled shoe and its last at station E.

The mechanism for locking the two slides 13 and 82 of each jackmechanism in the positions to which they are adjusted while at station Aby application thereto of the lasted shoe comprises two spring pressedlatches 85 and 86 (Figs. 4, 6, and 7), the former cooperating with theroll-carrying slide 82 and the latter with the heel-rest slide 13.

v The latch 85 is a slide made with a base section 81 slidably mountedwithin a radial slot 88 (Fig. 3) formed in turret head M, the baseportion being provided upon opposite sides thereof with flanges seatedupon the top surface of the turret head. At its inner end the basesection 81 is provided with a cam roll 89 which is urged by a spring 90toward a cam 9| that is fastened rigidly to the stationary pivot post 9by a set screw 92 (Fig. '7). The outer end of the base 81 of latch slide'85 has a pair of blade extensions 93 (Figs. 6 and 7) made at theirouter ends with inclined cam surfaces 94 cooperating with complementarycam surfaces 95 (Fig. 5) provided upon latch 86 upon opposite sidesthereof. The blade extensions 93 'are slidably mounted within a pair ofgrooves 96 (Fig. 3)

Fig. 4.

The latch 86 is loosely fitted within this pocket 91 together with apair of springs 98 by which the latch is urged upwardly. As shown inFigs. 4 and 5 the upper end of latch 86 has a radially disposed rack ofteeth 98 cooperating with a radial rack of teeth 99 provided upon thebottom of heel-rest slide 13. As shown in Figs. 4 and 6 the latch 85 isprovided with a vertical rack of teeth I08 cooperating with a verticalrack of teeth l0! provided upon toe-rest slide 82.

The fixed cam 9| (Fig. 7) is so constructed that, as each jack mechanismmoves from d to e, it acts through cam roll 89 to shift latch 85radially outwardly against the pressure of its spring 98 therebyunlocking toe-rest slide 82, and at the same time the latch 85, throughits cam blades 93, depresses latch 86 :thereby unlocking heel-rest slide13. Thereafter the cam 9| maintains both slides 82 and 73 unlocked untilthe jack mechanism moves from a to b whereupon the cam permits thespring pressed latches to reengage and lock the slides, which remainthus locked until the jack mechanism again moves from d to e.

As will be clear from Figs. 1 and 4 the gauge plate 5| provides aprojecting circular segmental flange which occupies a stationaryposition ab ve the circular path of the forepart of the shoe, and is ofsuch angular length that it engages and holds the forepart in positionuntil the loaded jack departs from position b.

Adjacent to position there is provided the member I02 referred to above(Figs. 2, 3, 9 and 10). This member has the form of a lever and ispivotally mounted at I03 upon the top wall I2 of the base of the machineand normally held by a spring I04 against a stop I05 which may be theflange at the lower end of one of the posts 50. While occupying thisnormal position the cam face I02a 0f lever I02 is just outside of thepath of the cam rolls 18 of the jack mechanism when the jacks are empty.When, however, a jack mechanism holding a lasted shoe arrives atposition 0 its cam roll It occupies an operative position farther awayfrom the axis of the turret head, contacts face I02a, and swings camlever I02 outwardly on its pivot I03 an angular distance proportionateto the size of the shoe on said jack mechanism. It will be observed thatthe outward radial displacement of cam rolls I8, brought about when thelasted shoes are placed upon the jack mechanisms at station A, varieswith the size of the shoes.

When the loaded jack mechanism departs from the position beneath thefiller depositing mechanism C, the spring I04 (Fig. 3) restores leverI02 to its normal position, the nose at the free end of said leverwiping idly across the outer beveled end of latch abutment 151 as saidlever is thus returned.

After a predetermined quantity of filler material has been delivered onto the shoe at station C (Fig. 1) the next step movement of the turrethead brings the shoe into position opposite the mechanism D whichspreads, irons and distributes the deposited filler material within theforepart cavity of the shoe, as more fully described in copendingapplication, Serial No. 762,136, filed July 19, 1947.

The jack now moves into position 6 where it is unlocked so that the shoecan be removed. The next movement returns the jack, still unlocked, intoposition a where it is ready to receive another shoe.

It should be understood that the present disclosure is for the purposeof illustration only and that this invention includes all modificationsand equivalents which fall within the scope of the appended claims.

What is claimed is:

1. In a machine of the type described a shoe jack adapted to support ashoe bottom-side uppermost, comprising a base, a vertically movablespring-supported toe rest mounted on said base, a toe latch memberadapted rigidly to support said toe rest, a heel rest supported on said'base for spring urged movement towards and in alignment with said toerest, a heel latch member adapted for opposing movement of said heelrest awa from said toe rest, and means for locking said latch members.

2. In a machine of the type described, the combination of a shoe jackaccording to claim 1 with a pivot post rotatably supporting said base, acontrol cam fixed to said post, and means 0perated by said cam foractuating said locking means.

3. A shoe jack according to claim 1 wherein said locking means includesa follower carried by said toe latch member and wherein said toe latchmember is provided with cam means associated with said heel latchmember, in combination with a driven control cam actuating said followerbeing adapted lIlO move said toe latch member into position unlockingsaid toe rest and to move with the toe latch member said cam means intoposition unlocking said heel latch.

4. A shoe jack according to claim 1 wherein said toe rest includes agauge flange mounted above said toe rest on said base and extendingtowards said heel rest, whereby the toe end of a shoe can be insertedbetween said flange and said toe rest while said toe rest is unlocked.

5. In a machine of the type described a shoe jack adapted to support alasted shoe bottomside uppermost, comprising a base, a verticallymovable spring-supported toe rest mounrted on said base, a toe latchmember adapted rigidly to support said toe rest, a heel-rest supportedon said base for spring-urged movement towards and in alignment withsaid toe rest, a heel latch member adapted for opposing movement of saidheelrest away from said, toe rest, and means for simultaneously lockingand unlocking said latch members.

CARL F. HAMMANN.

No references cited.

